K&N filters are both computer-designed as well as hand-tested on sample BMWs to make certain the purchasers get an OEM level of fit.
If you were to select one type of product produced by the Bayerische Motor Werke (BMW) to hold up as an example of their engineering prowess, it would have to be their inline six cylinder engines.
While much of the rest of the automotive worlds has abandoned the inline six for the more compact (especially for front-wheel drive applications) for some version of a V6, BMW has held tight to its commitment to the smoother-running straight six that requires no balance shafts or unusual timing needed to calm the otherwise rough-running V6 configuration. In fact, BMW has been experimenting with V6 designs for a number of year but are never able to get one to meet corporate noise and harshness standards.
While over the course of nine years, BMW has developed and replaced its six-cylinder designs, they have relied upon the same basic air box configuration, into which the K&N 33-2292 air filter is the perfect fit.
The first applications for the K&N 33-2292 began in 2003 with the BMW 520i, 525i, and 530i, which were fitted with BMW's M54 is a straight-six DOHC engine. The M54 uses an aluminum block with cast iron liners and an aluminum cylinder head with cast iron cylinder liners. Further, the M54 features variable valve timing to both camshafts (dual VANOS in BMW speak) and a dual length intake manifold, which was named DISA by BMW.
Underhood there's no sign that you've made a performance upgrade to your BMW six-cylinder engine.
The final application for this long-lived air filter design was the 2010 and 2011 BMW 630i. Despite the passing of eight years, the filter configuration, available as K&N 33-2292, remained the same even though the N52 engine was quite different.
Like the BMW M54, the BMW N52 is a straight-six DOHC engine. Compared with its M54 predecessor, the N52 features variable valve lift (ingeniously named Valvetronic by BMW), a lighter magnesium engine block and an electric water pump and a variable speed oil pump. Like the M54, the N52 uses an electronic throttle control, the VANOS variable valve timing to both camshafts and the dual length DISA intake manifold.
These are just the bookends of the applications for this filter. In between are cars as diverse as the Z4 and models of the 3, 5, and 7 Series.
Regardless of whether your BMW is powered by a 2.0 L, 2.5 L or 3.0 L engine, installing a K&N filter provides an increase of up to 50% incremental air flow to the engine. By increasing the flow of air, it can result in a more responsive throttle and improved torque at all points of your BMW's operating range.
K&N air filters are assembled from several layers of oiled cotton filter media, which accounts for their long service life. Also the oiled cotton medium allows for increased air flow as well as offers excellent filtration characteristics. Often OEM and less-expensive filters are made from more restrictive paper media which can actually limit the output potential of the engine. The performance of each filter design is verified through K&N's in-house efficiency testing, which follows strict ISO 5011 standards, and confirms that K&N filters provide a high volume of intake airflow without sacrificing engine longevity.
And once you've installed your K&N 33-2292 air filter you've eliminated the need to purchase and replace paper filters for the life of your six-cylinder BMW 3, 5, 6, 7, and Z4 series. The only maintenance necessary is one you can do yourself in just a short time. At intervals of 50,000 miles or about 80,000 kilometers (depending on your driving conditions) simply use a K&N air filter cleaning kit to easily clean and re-oil your air filter -- returning it to like-new performance levels. Your one K&N air filter is designed to last the lifetime of your vehicle, which K&N guarantees will perform for up to 10 years or 1,000,000 miles without requiring replacement. For full details visit the K&N Million Mile Limited Warranty.
You can order the filter simply by using the part number 33-2292 and while you're at it, grab an air filter cleaning kit, part number 99-5000.
Vehicles that the 33-2292 fits:
2011 BMW 630I 3.0L L6
2010 BMW 630I 3.0L L6
2010 BMW 530I 3.0L L6
2010 BMW 528I XDRIVE 3.0L L6 - US
2010 BMW 528I XDRIVE 3.0L L6 - Non-US, E60, E61
2010 BMW 528I 3.0L L6 - US
2010 BMW 528I 3.0L L6 - Non-US, E60, E61
2010 BMW 525I 3.0L L6
2010 BMW 523I 2.5L L6 - E60, E61
2009 BMW Z4 3.2L L6
2009 BMW 630I 3.0L L6
2009 BMW 530I 3.0L L6
2009 BMW 528XI 3.0L L6
2009 BMW 528I XDRIVE 3.0L L6
2009 BMW 528I 3.0L L6
2009 BMW 525I 3.0L L6
2009 BMW 523I 2.5L L6
2008 BMW Z4 3.2L L6
2008 BMW 630I 3.0L L6
2008 BMW 530XI 3.0L L6
2008 BMW 530I 3.0L L6
2008 BMW 528XI 3.0L L6
2008 BMW 528I 3.0L L6
2008 BMW 525XI 3.0L L6
2008 BMW 525I 3.0L L6
2008 BMW 525I 2.5L L6
2008 BMW 523I 2.5L L6
2007 BMW Z4 3.2L L6
2007 BMW 630I 3.0L L6
2007 BMW 530XI 3.0L L6
2007 BMW 530I 3.0L L6
2007 BMW 525XI 3.0L L6
2007 BMW 525I 3.0L L6
2007 BMW 525I 2.5L L6
2007 BMW 523I 2.5L L6
2006 BMW Z4 3.2L L6 - Non-US
2006 BMW 630I 3.0L L6
2006 BMW 530XI 3.0L L6
2006 BMW 530I 3.0L L6
2006 BMW 525XI 3.0L L6
2006 BMW 525I 3.0L L6
2006 BMW 525I 2.5L L6
2006 BMW 523I 2.5L L6
2005 BMW 630I 3.0L L6
2005 BMW 530XI 3.0L L6
2005 BMW 530I 3.0L L6
2005 BMW 525XI 3.0L L6
2005 BMW 525I 2.5L L6
2005 BMW 523I 2.5L L6
2005 BMW 520I 2.2L L6
2004 BMW 630I 3.0L L6
2004 BMW 530I 3.0L L6 - US
2004 BMW 530I 3.0L L6 - E60, E61
2004 BMW 525I 2.5L L6 - US
2004 BMW 525I 2.5L L6 - E60, E61
2004 BMW 520I 2.2L L6 - E60, E61
2003 BMW 530I 3.0L L6 - E60
2003 BMW 525I 2.5L L6 - E60, E61
2003 BMW 520I 2.2L L6 - E60, E61
2003 BMW 520I 2.0L L6 - E60, E61
To find additional K&N upgrades for cars, trucks, scooters, motorcycles, motorhomes, or almost anything with an engine, use Search by Vehicle tool and you can find a local K&N retailer by plugging your location into the K&N Dealer Search as well.